<template>
  <div class="todo-container">
    <div class="todo-wrap">
      <Header :addTodo="addTodo"></Header>
      <List :todoList="todoList" :updataDone="updataDone" :deleteOne="deleteOne"/>
      <Footer :todoList="todoList" :changeAllDone="changeAllDone" :removeAllDone="removeAllDone"></Footer>
    </div>
  </div>
</template>

<script>
import Header from "@/components/Header";
import Footer from "@/components/Footer";
import List from "@/components/List";
export default {
  name: "App",
  components: {
    Header,
    Footer,
    List,
  },
  data() {
    return {
      todoList: [],
    };
  },
  mounted(){
    this.todoList = JSON.parse(localStorage.getItem("todoList") || "[]");
  },
  methods:{
      // 增加数据
      addTodo(newTodo){
        this.todoList.unshift(newTodo);
      },
      // 修改选中状态
      updataDone(id){
       this.todoList.forEach((item)=>{
          if(item.id===id){
            item.done= !item.done;
          }
        })
      },
      // 删除单个数据方法
      deleteOne(id){
        this.todoList =this.todoList.filter((item)=>{
          return item.id !==id;
        })
      },
      // 改变全选
      changeAllDone(newVal){
        this.todoList=this.todoList.map((item)=>{
          item.done =newVal;
          return item;
        })
      },
      // 删除已完成
      removeAllDone(){
        this.todoList = this.todoList.filter((item)=>{
          return !item.done;
        })
      }
  },
  watch:{
    todoList:{
      deep:true,
      handler(){
        localStorage.setItem("todoList",JSON.stringify(this.todoList));
      }
    }
  }
};
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>
